1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "private/bionic_time_conversions.h" 30 31 #include "private/bionic_constants.h" 32 33 bool timespec_from_timeval(timespec& ts, const timeval& tv) { 34 // Whole seconds can just be copied. 35 ts.tv_sec = tv.tv_sec; 36 37 // But we might overflow when converting microseconds to nanoseconds. 38 if (tv.tv_usec >= 1000000 || tv.tv_usec < 0) { 39 return false; 40 } 41 ts.tv_nsec = tv.tv_usec * 1000; 42 return true; 43 } 44 45 void timespec_from_ms(timespec& ts, const int ms) { 46 ts.tv_sec = ms / 1000; 47 ts.tv_nsec = (ms % 1000) * 1000000; 48 } 49 50 void timeval_from_timespec(timeval& tv, const timespec& ts) { 51 tv.tv_sec = ts.tv_sec; 52 tv.tv_usec = ts.tv_nsec / 1000; 53 } 54 55 // Initializes 'ts' with the difference between 'abs_ts' and the current time 56 // according to 'clock'. Returns false if abstime already expired, true otherwise. 57 bool timespec_from_absolute_timespec(timespec& ts, const timespec& abs_ts, clockid_t clock) { 58 clock_gettime(clock, &ts); 59 ts.tv_sec = abs_ts.tv_sec - ts.tv_sec; 60 ts.tv_nsec = abs_ts.tv_nsec - ts.tv_nsec; 61 if (ts.tv_nsec < 0) { 62 ts.tv_sec--; 63 ts.tv_nsec += NS_PER_S; 64 } 65 if (ts.tv_nsec < 0 || ts.tv_sec < 0) { 66 return false; 67 } 68 return true; 69 } 70
